首先添加一个镜像加速
##注意分隔符

vim /etc/docker/daemon.json

"registry-mirrors": ["https://8auvmfwy.mirror.aliyuncs.com"]

1.拉取最新镜像

docker pull registry 

2.将registry镜像运行并生成一个容器

docker run -d -v /opt/registry:/var/lib/registry -p 5000:5000 --restart=always --name registry registry:latest

-v 参数本地挂载到/opt/registry中

3.因为我们启动的registry服务不是安全可信赖的。这时需要修改客户端docker的配置文件/etc/docker/daemon.json
##集群中要用到私仓的都要修改

"registry-mirrors": [ "https://pee6w651.mirror.aliyuncs.com"],"insecure-registries": ["192.168.26.130:5000"]

https://pee6w651.mirror.aliyuncs.com 为国内镜像仓代理，
192.168.26.130:5000 为registry启动的机器ip

重启docker生效

systemctl restart docker

命令查看

curl -XGET http://192.168.26.130:5000/v2/_catalog

4.搭建完成，开始测试

[root@k8s-01 ~]# docker pull nginx  ##集群任一节点拉取
Using default tag: latest
latest: Pulling from library/nginx
69692152171a: Pull complete
49f7d34d62c1: Pull complete
5f97dc5d71ab: Pull complete
cfcd0711b93a: Pull complete
be6172d7651b: Pull complete
de9813870342: Pull complete
Digest: sha256:df13abe416e37eb3db4722840dd479b00ba193ac6606e7902331dcea50f4f1f2
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
[root@k8s-01 ~]# docker images ##查看本地镜像
REPOSITORY                                                        TAG        IMAGE ID       CREATED         SIZE
nginx                                                             latest     f0b8a9a54136   11 days ago     133MB
calico/node                                                       v3.19.0    b0744cc52c19   3 weeks ago     153MB
calico/pod2daemon-flexvol                                         v3.19.0    a5decf77918d   3 weeks ago     21.7MB
calico/cni                                                        v3.19.0    3d17cd6307a4   3 weeks ago     146MB
calico/node                                                       v3.15.5    f0393ae546b5   4 weeks ago     437MB
calico/pod2daemon-flexvol                                         v3.15.5    0cdfd80862a1   4 weeks ago     21.9MB
calico/cni                                                        v3.15.5    42b7a3f2bfdf   4 weeks ago     109MB
registry.aliyuncs.com/google_containers/kube-proxy                v1.18.14   8e6bca1d4e68   5 months ago    117MB
registry.aliyuncs.com/google_containers/kube-apiserver            v1.18.14   f17e261f4c8a   5 months ago    173MB
registry.aliyuncs.com/google_containers/kube-controller-manager   v1.18.14   b734a959c6fb   5 months ago    162MB
registry.aliyuncs.com/google_containers/kube-scheduler            v1.18.14   95660d582e82   5 months ago    95.3MB
registry.aliyuncs.com/google_containers/pause                     3.2        80d28bedfe5d   15 months ago   683kB
registry.aliyuncs.com/google_containers/coredns                   1.6.7      67da37a9a360   16 months ago   43.8MB
registry.aliyuncs.com/google_containers/etcd                      3.4.3-0    303ce5db0e90   19 months ago   288MB
[root@k8s-01 ~]# docker tag nginx 192.168.26.130:5000/nginx-5-23 ##tag成标准格式
[root@k8s-01 ~]# docker push 192.168.26.130:5000/nginx-5-23      ##上传镜像
Using default tag: latest
The push refers to repository [192.168.26.130:5000/nginx-5-23]
f0f30197ccf9: Pushed
eeb14ff930d4: Pushed
c9732df61184: Pushed
4b8db2d7f35a: Pushed
431f409d4c5a: Pushed
02c055ef67f5: Pushed

[root@k8s-04 ~]# curl -XGET http://192.168.26.130:5000/v2/_catalog  ##换个节点查看私仓状态
{"repositories":["nginx-5-23"]}
[root@k8s-04 ~]# docker pull 192.168.26.130:5000/nginx-5-23   ##拉取成功
Using default tag: latest
latest: Pulling from nginx-5-23
69692152171a: Pull complete
49f7d34d62c1: Pull complete
5f97dc5d71ab: Pull complete
cfcd0711b93a: Pull complete
be6172d7651b: Pull complete
de9813870342: Pull complete
Digest: sha256:eba373a0620f68ffdc3f217041ad25ef084475b8feb35b992574cd83698e9e3c
Status: Downloaded newer image for 192.168.26.130:5000/nginx-5-23:latest
192.168.26.130:5000/nginx-5-23:latest